Alright, so there are no limits? Excellent! Then I'm simply going to cross-post from a LiveJournal post of mine where I responded to a challenge to devise what I considered to be the greatest U2 setlist for me personally. Enjoy!
Explanation of terms;
--> = song flows into the next with at least one band member playing/singing on through the transition.
/ = songs are inextricably linked. Really, can anyone even say where The Cry ends and The Electric Co. begins?
Comments in italics = relevant notes on the performance.
I'm not allowing for Bono to talk. These songs are meant to flow perfectly, even if all band members wholly stop before beginning the next tune. If Bono wants to do one of his rants, he can do it in the middle of a song (i.e. "Fuck the Revolution" from Sunday Bloody Sunday, 8 November 1987) or tell a story during the intro of the song (i.e. "Dream it all up again" from Love Rescue Me, 30 December 1989)
Main set
Where The Streets Have No Name - No intro required. Background goes red, organ blasts over the stadium, and band enter progressively, a la JT/Lovetown tour. If Bono has time, he can recite William Wordsworth's Resolution And Independence or Psalm 116 during the instrumental intro.
One Tree Hill
Exit --> Gloria - Van Morrison's Gloria
In God's Country
Pride (In The Name Of Love)
Trip Through Your Wires
Desire --> All Along The Watchtower
Wire
MLK --> The Unforgettable Fire
God Part II
Gone --> Until The End Of The World --> Who's Gonna Ride Your Wild Horses
One --> She's A Mystery To Me - Full band performance of SAMTT
All I Want Is You/Bad* --> Please --> October --> New Year's Day
*Because it's just too detailed to insert there: (AIWIY solo blends into first notes) Bad --> Ruby Tuesday (snippet) --> Sympathy For The Devil (snippet) --> Final verse of Bad and Edge solo --> Walk On The Wild Side (snippet) --> Candle In The Wind (snippet) --> Fool To Cry (snippet) --> The First Time (first and second verses and chorus) (Adam's Please bass kicks in). It's epic, I know. I'm basically just combining all the best of Bad, though tragically omitting the 'come on down' verse from the UF Tour. This would surely beat the record for the longest performance, which I believe is around the 15-16 minute mark.
Set on b-stage
Band leaves the stage besides Edge, who goes to the b-stage in the middle of the crowd.
Van Diemen's Land - solo.
Larry and Adam join him.
Seconds - sans Bono.
Larry and Adam leave, Bono appears and joins Edge.
Two Shots Of Happy, One Shot Of Sad - Bono and Edge duet.
Angel Of Harlem - A la Slane Castle; Edge plays the first verse on electric guitar with Bono singing, and then Adam and Larry reappear for the rest of the song.
When Love Comes To Town - Edge sings the "I was there when they crucified my Lord" verse, Adam and Larry sing the chorus after that.
Stay (Faraway, So Close!) - Full band, Bono also on guitar.
Tomorrow - Edge on that whistle thing for the first half of the song.
Surrender --> Two Hearts Beat As One --> Gloria - Bono dances through the crowd during Surrender, extending the performance past the ten minute mark. During Gloria, he introduces the band with false names ("Larry McGuiggin on drums, ladies and gentlemen!") and ends it with a snippet of Van Morrison's Gloria ("Gloria, in te domine, gloria, GLORIA! G-L-O-R-I-A!") before falling backwards into the crowd.
Encore #1
Promenade --> 4th Of July --> Hawkmoon 269 - Bono appears mysteriously up in the crowd on one side of the stadium, Edge on the other. They perform Promenade, and then Bono vanishes, while Edge walks through the crowd to the main stage, playing 4th of July and the long Hawkmoon intro and arrives at the stage as the rest of the band appear.
Dirty Day --> Bullet The Blue Sky --> Running To Stand Still --> Hallelujah --> Dirty Old Town - Bullet The Blue Sky has the extended ZooTV solo. Edge plays RTSS on guitar. Larry sings Dirty Old Town.
Kite
Heartland --> With Or Without You --> Shine Like Stars --> Love Will Tear Us Apart
Encore #2
Zooropa - Long, long intro with the media barrage of ZooTV, featuring the best of what came before Zoo Station and Daddy's Gonna Pay For Your Crashed Car, combined with the actual studio intro of Zooropa. Edge then takes the stage, playing the distorted guitar, and the others soon join him.
Beautiful Day
Last Night On Earth --> The Fly
Encore #3
I know U2 concerts only have two encores, but this is my greatest ever concert and I'll do what I like. I'll also make this encore as long as I feel like.
Twilight
The Cry/The Electric Co. --> Hold Me, Thrill Me, Kiss Me, Kill Me --> Children Of The Revolution
I Will Follow
11 O'clock Tick Tock --> The Ocean --> A Sort Of Homecoming - When you think about it, that actually works!
Sunday Bloody Sunday - First verse played slowly, a la some Joshua Tree tour performances. Song is played twice like at Cork, 8 August 1987.
40 --> Help --> 40 --> Feed The World (Let Them Know It's Christmastime) --> 40 - Epic performance combining the best of 40, best additional verses of 40, and the best snippets inserted into 40 to create something that beats the 31 January 1985 performance for ultimate length. For the record, the 31/01/85 performance went for 16:45. 40 was 2:36 in the studio. Edge and Adam, of course, swap instruments.